Kodi doesn't set the CAPATH and CAINFO parameters for libcurl. To make HTTPS
connections work we can set them based on SSL_CERT_DIR and SSL_CERT_FILE.

--- a/xbmc/filesystem/CurlFile.cpp
+++ b/xbmc/filesystem/CurlFile.cpp
@@ -626,8 +626,12 @@
   if (!m_cipherlist.empty())
     g_curlInterface.easy_setopt(h, CURLOPT_SSL_CIPHER_LIST, m_cipherlist.c_str());

+  // Load certificate data from environment paths
+  g_curlInterface.easy_setopt(m_state->m_easyHandle, CURLOPT_CAPATH, getenv("SSL_CERT_DIR"));
+  g_curlInterface.easy_setopt(m_state->m_easyHandle, CURLOPT_CAINFO, getenv("SSL_CERT_FILE"));
+
   if (CServiceBroker::GetSettingsComponent()->GetAdvancedSettings()->m_curlDisableHTTP2)
     g_curlInterface.easy_setopt(h, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
   else
     // enable HTTP2 support. default: CURL_HTTP_VERSION_1_1. Curl >= 7.62.0 defaults to CURL_HTTP_VERSION_2TLS
     g_curlInterface.easy_setopt(h, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_2TLS);
